Fluke Calibration PG7607, PG7607 Operation and Maintenance Manual

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PG7607

Piston Gauge

Operation and Maintenance Manual

(Use with PG7000 Operation

and Maintenance Manual)

 Warning

High pressure liquids and gases are potentially hazardous. Energy stored in these liquids and gases can be released unexpectedly and with extreme force. High pressure systems should be assembled and operated only by personnel who have been instructed in proper safety practices.

Information in this document i s subject to change without noti ce. No part of this docum ent may be reproduced or transmitt ed i n any form or by any means, elect ronic or mechanical, for any purpose, without the express writt en permission of Fluke Calibration,

4765 East Beautiful Lane, Phoenix, Arizona 85044-5318 USA.

Fluke Calibration makes sincere efforts to ensure the accuracy and quality of its published materials; however, no warranty,

expressed or implied, is provided. Fl uke Calibration disclaims any respons ibility or liability for any direct or indirect damages resulting from the use of the inform ation in this manual or products described in it. Mention of any product or brand does not constitute an endorsem ent by Fluke Calibration of that product or brand. This manual was original ly composed in English and was subs equentl y transl ated int o other languages . T he fidel ity of the trans lat ion cannot be guaranteed. In c ase of conf lic t bet ween the English version and other language versions, the English version predom i nates.

Products described in thi s manual are manufac tured under international patents and one or more of the following U.S. patents: 6,701,791, 5,142,483, 5,257,640, 5,331,838, 5,445,035. Other U.S . and international patents pending.

Fluke Calibration, FCAL, DH, DHI, PG7000, PG7607, P G7102, PG7202, PG7302, PG7601, COMPASS, CalTool are tradem arks, registered and otherwise, of Fluke Corporation.

Swagelok is a regis t ered trademark of the Swagelok Company Krytox and Viton are trademarks of t he Dupont de Nemours Company

Document No. 3152174 101215 Printed in the USA.

Table Of Contents ................................................................ III

Tables ................................................................................. IV

Figures ................................................................................ IV

About This Manual .................................................................. v

1. Introduction ..................................................................... 1

1.1 Product Overview ................................................................................................................................... 1

1.2 Specifications ......................................................................................................................................... 2

1.2.1 General Specifications ............................................................................................................................ 2

1.2.2 Piston-Cylinder Assembly ....................................................................................................................... 2

1.2.3 Pressure Measurements .......................................................................................................................... 2

2. Installation ....................................................................... 3

2.1 Unpacking and Inspection ..................................................................................................................... 3

2.1.1 Removing From Packaging ..................................................................................................................... 3

2.1.1.1 Piston-Cylinder Assembly ...................................................................................................................... 3

2.1.2 Inspecting Contents ................................................................................................................................. 4

2.1.2.1 PG7607 Platform ................................................................................................................................... 4

2.1.2.2 Piston-Cylinder Assembly ...................................................................................................................... 5

2.2 Initial Setup ............................................................................................................................................. 5

2.2.1 CCP Pressure Connection ....................................................................................................................... 5

2.2.2 Installing and Removing the Piston-Cylinder Assembly ....................................................................... 5

3. Operation ......................................................................... 9

3.1 Controlled Clearance Pressure (CCP) .................................................................................................. 9

3.2 [HEAD] ..................................................................................................................................................... 9

4. Maintenance, Adjustments and Calibration ....................... 11

4.1 Piston-Cylinder Assembly and Disassembly ..................................................................................... 11

4.2 Cleaning Piston-Cylinders ................................................................................................................... 12

4.3 Piston-Cylinder Recalibration ............................................................................................................. 12

4.3.1 Mass of the Cylinder .............................................................................................................................. 12

4.4 Disassembly of Piston Retaining Assembly ...................................................................................... 12

4.4.1 Disassembly Procedure ......................................................................................................................... 13

4.4.2 Reassembly Procedure .......................................................................................................................... 14

5. Troubleshooting ............................................................. 15

5.1 Overview ............................................................................................................................................... 15

TABLES AND FIGURES

Tables

Table 1. PG7607 Parts List Table 2. 50 mm Gas Piston-Cylinder Assembly Parts List Table 3. PG7607 Troubleshooting Checklist

Figures

Figure 1. Piston-Cylinder Installation Figure 2. Piston Retainer Assembly

.......................................................................................................................... 4

........................................................................... 5

.............................................................................................. 15

............................................................................................................ 7

........................................................................................................... 13

About This Manual

This manual is designed to be used in conjunction with the PG7000 Piston Gauges Operation and Maintenance Manual, to operate a PG7607 Piston Gauge.

PG7607 is identical in conception and featur es to a PG7601 piston gauge. PG7607 differs only in the pistoncylinder mounting post and the piston-cylinder module as PG7607 is designed to exploit a unique 50 mm diameter piston-cylinder. This manual covers the aspects of PG7607 that are different from PG7601.

To operate a PG7607, us e the PG 7000 Piston G auges O per ation and Maintenance Manual and f ollow the instructions and informat ion applying to PG7601. Refer to this manual for details on the piston-cylinder mounting post and piston-cylinder module.

Note

In PG7607, the CYLINDER rather than the PISTON floats and is rotated. When using the PG7000 M anual to operate PG 7607, references to the PISTON of PG7601 apply to the CYLINDER of PG7607.

Manual Conventions

 Caution

“Caution” is used in throughout the manual to identify conditions or actions that could cause harm to the PG7607 or to the devices that are connected to it.

 Warning

“Warning” is used in throughout the manual to identify actions that could pose a hazard to the user of the PG7607.

Note

“Note” is used throughout the manual to identify operating and applications advice and additional explanations.

[ ] Indicates direct function keys (e.g., [RANGE]). < > Indicates molbox1+ screen displays (e.g., <1yes>).

PG7607™ OPERATION AND MAINTENANCE MANUAL

Notes

1. Introduction

1.1 Product Overview

PG7607 is a special model in the PG7000 line of piston gauges. PG7607 is identical to PG7601 except for its piston-cylinder and mounting post.

PG7607 was designed to exploit a unique 50 mm diam eter piston-cylinder. With this piston-cylinder, the piston is mounted in a fixed position in the mounting post and the cylinder floats and is rotated. A controlled clearance pressure can be introduced into the mounting post allowing the piston diameter and thus the gap between the piston and cylinder to be varied.

PG7607 is available on a limited basis and, generally, is only offered for use in national measurem ent institutes or other laboratories performing fundamental research in pressure metrology.

Note

This manual is intended to be used as a supplement to the PG7000 Manual. PG7607 is identical to PG7601 except for it s pist on-cylinder and mounting post. To operate a PG7607, use a PG7000 Operation and Maint enance M anual and apply the information on PG7601 referring to this manual for piston-cylinder and mounting post information. Also keep in mind that in PG7607, the CYLINDER, rather than the PISTON, floats and is rotated. References to the PG7601 PISTON in the PG7000 Manual apply to the CYLINDER of PG7607.

PG7607™ OPERATION AND MAINTENANCE MANUAL

mass loaded.

17 kg (29 lb)

Overall Pressure Ranges

with 35 kg mass set

Gauge: 5 to 175 kPa (0.7 to 25.4 psi) Absolute: 5 to 175 kPa (0.7 to 25.4 psi)

Operating Medium

Clean, dry, non-corrosive gas

Maximum Mass Load

35 kg (38 kg with AMH automated mass handler)

CE Conformance

Available, must be specified.

Piston Material:

Tungsten carbide

Cylinder Material:

Tungsten carbide

Nominal Diameter:

50 mm

Nominal Area:

2 000 mm

Free deformation with controlled clearance pressure (CCP) available on inside of piston.

Full mass load

< 0.1 mm/min

Sensitivity1:

0.01 Pa + 0.5 ppm

Reproducibility2:

± 2 ppm

1.2 Specifications

1.2.1 General Specifications

Specifications below are spec ific to PG7607. All other specific ations are identical to PG7000 specifications found in the PG7000 Operation and Maintenance Manual (P/N 3152117).

Weight

Instrument platform with no

Pressure Connections

TEST Port

Bell Jar Vent Port

Piston Controlled Clearance

Pressure (CCP)

Vacuum Reference Ports

DH200 DH200

DH200

NOTE: DH200 is a gland and collar type fittings for 1/4 in. (6 mm) coned and left hand threaded tubes equivalent to AE SF250C, HIP LF4, etc.

KF25 on platform and bell jar (KF40 available on optional AMH automated mass handler)

1.2.2 Piston-Cylinder Assembly

The piston is mounted in a fixed position on the mounting post. The cylinder floats and is rotated.

Mounting System:

Typical Drop Rate:

1.2.3 Pressure Measurements

The piston is mounted in a fixed position on the mounting post. The cylinder floats and is rotated.

1 Sensitivity: The smallest variation in input detectable in output. 2 Reproducibility: Combined long term stability of piston-cylinder effective area and masses.

2. Installation

2.1 Unpacking and Inspection

2.1.1 Removing From Packagi ng

PG7607 is delivered (along with its standard accessories) in a reusable molded transit case with polyurethane inserts to hold it in place.

Remove the PG7607 and its accessories from the shipping container and remove each element from its protective plastic bag.

2.1.1.1 Piston-Cylinder Assembly

The piston-cylinder assembly is shipped in a molded plastic case with custom polyethylene inserts that accommodates 2 Acetal bullet cases. The piston and the cylinder are separate; each is packed in its own bullet case. Do not handle either of these elements with your bare hands. Use the gloves that are in the PG7607 accessory kit or use the lint free wipes.

 Caution

Never handle the piston or cylinder with bare hands. Oil and acids from bare skin can damage the critical surf aces (polished appearance).

PG7607™ OPERATION AND MAINTENANCE MANUAL

2.1.2 Inspecting Contents

Check that all items are present and have NO visible damage.

2.1.2.1 PG7607 Platform

Table 1. PG7607 Parts List

PG7607

# 3069845

MOTORIZED ROTATION

NON-CE Platform Mass Bell

Bell Jar W/KF16 Terminal PG Terminal to Platform Cable

Non-CE (DB 2 5M - DB25F, ≈ 1.8 meters) CE (DB 2 5M - DB25F, ≈ 1.5 meters)

Power Cable Accessory Kit 401049

Cable, nul l modem (for flashing) 3077370 (2) NIP, SS, DH200, 2.75" 3068377 (2) ADPT, SS, DH200 F X 1/8 in. NPT F 3068547 (2) O-ring, Viton, brown, 2-029 3144730 O-ring, Vi ton, brown, 2-019 3134945 (2) O-ring, Buna, 2-242 3135041 Cover, storage, 7600 type 3135594 All en wrench, 2. 5 mm 3136044 All en wrench, 3 mm 3135703 All en wrench, 5 mm 3136098 Krytox GPL205/6 0.5 oz Gif t kit with gloves 3123777 ADPT , DH200 M X 1/8 in. swage 3069062 Valve, vac uum relief 3124573

Documentation

Calibrat i on Report (P G ) Calibrat i on Report (Mass Bell) Techni cal Data Manuals

Documentation CD

3118270 3118296

3071603 3070377 3069735

3068724

3133781 3153005

2493420

3152121 3152121

3152139 3152117 (PG7000) 3152174 (PG7607)

3139043

PG7607

# 3072356

MOTORIZED ROTATION

3072235

2. INSTALLATION

2.1.2.2 Piston-Cylinder Assembly

Table 2. 50 mm Gas Piston-Cylinder Assembly Parts List

Piston-cylinder kit

Piston-cylinder 3118415 Piston-cylinder case (w/ 2 bullet

cases)

Accessory Kit

(2) O-rings, brown, Viton (2-015) 3134923

Documentation

Calibrat i on report

2.2 Initial Setup

2.2.1 CCP Pressure Connec t ion

The pressure connec tion labeled CCP is f or the application of a c ontr olled clearanc e pres s ure to the inside of the piston (see Section 3.1). In norm al operation, the measured pressure is applied to the CCP pressure connection. Use a tee to connect the TEST port and the CCP port together.

5 KPA/KG

PC-7607-TC

3069892

3121645

3118500

3152121

2.2.2 Installing and Removing the Piston-Cylinder Assembly

Note

Unlike other PG7000 models, the PG7607 piston-cylinder and mounting elements are not an integrated module. The piston and cylinder are delivered and installed as separate parts.

 Caution

Given the large diameter and small annular gap of the PG7607 pistoncylinders, it is very difficult to insert the piston into the cylinder without the aid of the alignment mechanism provided by the PG7607 platform mounting post and piston retaining assembly. There is a risk of cocking the piston in the cylinder. It is not reco mmended tha t the piston e ver be put into the cylinder when the piston is not installed on the PG7607 mounting post.

To operate the PG7607 platform, a piston-cylinder must be installed on its mounting post. To install a piston-cylinder assembly on the PG7607 platform, follow the sequential procedure below. This procedure may be used on the first and subsequent piston-cylinder installations; it may also be used in reverse order to remove a piston-cylinder. Numerical references in the procedur e refer to Figure 1.

PG7607™ OPERATION AND MAINTENANCE MANUAL

 Remove the piston retaining assembly (5). The PG7607 platform is delivered with the

piston retaining assembly (5) installed in the mounting post (7). Holding the piston retaining assembly by the knurled surface (14), unscrew it (rotate CCW) fully from the mounting post and remove it. Avoid touching the WHITE cylinder centering ring (15) as it will eventually contact the critical inside surface of the cylinder.

 Check that the lower piston sealing O-ring (10a) is installed. T he PG7607 platf or m is

delivered with the lower and upper piston sealing O-rings (10a, 10b) and O-ring carriers installed loosely in the recess on the mounting post. Remove the upper O-ring and Oring carrier (10b) and retain. Check that the lower O-ring and O-ring carrier (10a) are present and properly seated. (If needed two spare o-rings are included in the PG7607 platform accessory kit).

 Remove the piston (6) from its packing. Using lint free gloves or wipes to avoid direct

contact with the piston cr itical surface (polished appear ance) remove the piston (6) fr om its packing.

Never handle the piston or cylinder with bare hands. Oil and acids from bare skin can damage the critical surfaces (polished appearance). The cylinder is pa rt of the ma ss load and contami nation ca n change its mas s.

 Caution

 Install the piston (6) on the mounting post (7). With the end of the piston etc hed with “X”

and/or the serial num ber UP (11) so that it will enter the cylinder first, slip the piston over the mounting post and slide it down until it seats on O-ring (10a.) Check that the end of the piston facing UP has “X” and/or the serial number marked on it.

 Install the piston retaining assembly (5). Place the upper O-ring and carrier (10a) centered

on the top surface of the piston. Hold the piston retaining assembly (5) by the knurled ring (14); avoid touching the white cylinder centering ring (15) as it will eventually contact the critical inside surface of the cylinder. Thread the piston retaining assembly into the top of the mounting post (7) and screw it down carefully assuring that upper O-ring carrier (10a) is not pinched. The assembly’s shoulder (13) should meet the top of the piston (11) with no gap between the two surfaces. There will be some resistanc e from the m ounting post O -ring (12), only hand tightening is needed. Do not use tools to install the piston retaining assembly. Tighten lightly by hand until the assembly reaches the end of the engagement threads and surfaces (13) and (11) meet.

 Clean the piston (6) and the cylinder centering ring (15), consider cleaning the

cylinder (4). Using the glass cleaner method described in Section 4.2, clean the

piston (6) and the cylinder centering ring (15). If this is the first piston-cylinder installation, also clean the cylinder (4). On subsequent installations consider cleaning the cylinder before installing it.

 Verify that the cylinder cap O-ring (3) is properly installed. Remove the cylinder (4) from

its packing. It is delivered with the cylinder cap O-ring (3) installed. Check that the O-ring is present and properly seated. If not, install one (an extra one is included in the piston-cylinder accessories). Use tweezers or another long narrow tool. DO NOT touch the inside of the cylinder.

 Verify that the cylinder adjustment mass (17) is properly installed. Check that the

cylinder adjusting mass (17) is present and completely threaded onto the cylinder retaining screw (2). This mass is used to adjust the total cylinder mass to the value reported in the calibration report.

 Install the cylinder (4) on the piston (6). Gently slip the cylinder (4) over the piston (6).

The cylinder centering ring (15) aligns the cylinder on the piston facilitating the insertion process. Allow the cylinder to slip all the way down the piston until it reaches end of stroke.

2. INSTALLATION

 Tighten the cylinder retaining screw (2). Using a 5 mm Allen tool (one is supplied in

the PG7607 accessories), tighten the c ylinder retaining screw (2) into the cylinder stroke limiter (16) of the pis ton retaining assembly (5). Turn the screw CW to tighten. Since the cylinder stroke limiter (16) is free to move within the piston retaining assembly (5), the retaining screw (2) may rotate with the assembly, failing to tighten. If this is the case, press down a bit or lift up on the scr ew to help it engage and tighten. Tighten gently until you can feel the cylinder cap O-ring (3) takes its seat in the cylinder stroke limiter.

 Caution

Be sure the cylinder retaining screw (2) is tightened before applying pressure to the piston-cylinder. The cylinder stroke limiter (16) limits the cylinder’s upward m ovement pre venting it from c oming off the pi ston.



Cylinder Cap

 Cylinder Retaining Screw  Cylinder Cap O-ring (Brown, Viton, 2-015)  Cylinder  Piston Retainer Assem bl y/ Nut  Piston  Mounting Post (part of P G7607 pl atform)  Controlled Clearance Pressure (CCP) Inlet  Test Press ure I nl et a. Piston Sealing O-ring – lower

(Brown Viton, 2-029)

b. Piston Sealing O-ring – upper

(Brown Viton, 2-029)

 Piston Top Surf ace  Mounting Post O-ring (B rown, Vi t on, 2-019)  Piston Retainer A ssembly Shoulder  Knurled Gripping Holding Surface  Cylinder Centering Ring  Cylinder Stroke Limiter  Adjustment Mass

Figure 1. Piston-Cylinder Installation

PG7607™ OPERATION AND MAINTENANCE MANUAL

Notes

3. Operation

3.1 Controlled Clearance Pressure (CCP)

Note

In normal operation, the CCP pressure is the measured pressure. The pressure

PG7607 allows an independent pressure to be applied to the inside of the piston. The purpose of this feature is to allow the piston to be ar tificially expanded, varying the size of the gap between the piston and cylinder. The ability to predictably vary the size of the gap between the piston and the cylinder can be useful in analyzing piston-cylinder behavior.

The controlled clearance pressure is introduced through the CCP port on the back of the PG7607 platform. The pressure is applied through the mounting post t o the inside of the pis ton (s ee Figure 1, Ref. 8). The pressure is contained by the two piston sealing O-rings (see Figure 1, Refs. 10a, 10b).

The piston sealing O-rings are positioned on the ends of the piston so that the deformation due to pres sure along the active zone of the piston is constant and parallel.

applied to the TEST port should also b e applied to the CCP port.

The expansion of the piston with pressure can be predicted using thick walled cylinder stress/strain relations and the mechanical properties of the piston material (tungsten carbide). The result is 0.16 micron on the diameter/MPa.

A typical 50 mm piston-cylinder assembly has a radial gap of 0.9 micron so a CCP of 3 MPa will reduce the gap by about 50%. Around 5 MPa, the CCP may close the gap completely causing mechanical contact between the piston-cylinder and damage to the parts.

 Caution

A controlled clearance pressure (CCP) of about 5 M Pa may close the gap between the piston and cylinder completely causing metal to metal contact between the two parts and possible damage.

3.2 [HEAD]

The natural reference level for the PG7607 piston-cylinder assembly is near the top of the cylinder cap. So that, in practice, the actual reference level is at a conveniently identified location, a reference level offset is applied. The reference level off set places the reference level at the bottom of the piston. This point is defined by the horizontal line where the bottom of the piston meets the mounting post when the piston is mounted.

The reference level offset is included in the piston-cylinder file (see PG7000 Operation and Maintenance Manual).

Note

When using a AMH-38 with the PG7607, the PG7607 reference level is 3 mm below the reference level marked on the AMH vacuum chamber. This is because the AMH-38 is marked for the PG7601.

PG7607™ OPERATION AND MAINTENANCE MANUAL

Notes

4. Maintenance, Adjustments and Calibration

4.1 Piston-Cylinder A ssembly and Disassembly

See the piston-cylinder installation and removal description in Section 2.2.2. The only possible further disassembly of the piston cylinder is the removal of the cylinder retaining screw and adjustment mass from the cylinder.

 Caution

• Given the large diameter and small annular gap of the PG7607 piston-

cylinders, it is very difficult to insert the piston into the cylinder without the aid of the alignment mechanism provided by the PG7607 platform mounting post. There is a risk of cocking the piston in the cylinder. It is not recommended that the piston ever be put into the cylinder when the piston is not installed on the PG7607 mounting post.

• Disassembly of the piston-cylinder assembly exposes the piston-cylinder to

possible damage. The main risk is damage to t he exposed critical wo rking surfaces. Only qualified personnel should undertake piston-cylinder disassembly and reassembly and the instructions and recommendations contained in this manual should be followed carefully throughout the operation.

• NEVER touch the lapped surfaces (polished appearance) of the piston or

cylinder with your bare hands. Body oils and acids can permanently etch the surfaces.

• The cylinder assembly (cylinder + cylinder cap + adjusting mass + cap

retaining screw + cylinder retainer) is part of the PG7607 mass load. Its mass has been measured and is reported in the calibration report. When handling these parts, take care not to change their mass by swapping parts, contaminating the m o r leaving parts out in reassembly.

PG7607™ OPERATION AND MAINTENANCE MANUAL

4.2 Cleaning Piston-Cylinders

The piston-cylinder cleaning methods described in the PG7000 Operation and Maintenance Manual should be used with the following exceptions/comments:

• Water/detergent method: Due to the piston-cylinder’s large diameter and very small annular gap, it

is very difficult to insert t he piston into the cylinder when the piston is not installed on the PG7607 mounting post. W ithout the alignment mechanism provided by the mounting post arrangement (see Figure 1) there is a substantial risk of cocking the cylinder on the piston. When using the water/detergent method to clean a PG7607 piston-cylinder, wash the cylinder and the piston separately and do not attempt to put the piston into the cylinder until the piston is installed on the PG7607 platform mounting post.

• Quick method: As it is difficult to hold the piston without making contact with its critical working

surface, install the piston onto the PG7607 platform mounting post to clean it (see Section 2.2.2).

4.3 Piston-Cylinder Recalibration

4.3.1 Mass of the Cylinder

The floating assembly of the PG7607 cylinder includes (see Figure 1):

• The cylinder and cap (4, 1).

• The cylinder cap screw (2).

• The adjustment mass (17).

• The cylinder cap O-ring (3).

• The cylinder stroke limiter (16).

To determine the mass of the floating cylinder assem bly, the mass of all these parts must be determined. T he cylinder stroke limiter (16) is captivated in the piston retaining assembly (5) and the retaining assembly must be disassembled to remove it. See Section 4.4 for disassembly instructions for the piston retaining assembly.

4.4 Disassembly of Piston Retaining Assembly

The piston retaining assembly (see Figure 2) does not need to be disassembled as part of routine maintenance. However, the piston retaining assem bly captivates the cylinder stroke limiter that is part of the of cylinder assembly whose mass must be determined when recalibrating the cylinder.

4. MAINTENANCE, ADJUSTMENTS AND CALIBRATION

4.4.1 Disassembly Procedure

To remove the cylinder stroke limiter from the piston retaining assembly follow the procedure below. To reassemble, follow the reassembly procedure in Section 4.4.2. Numerical references in this procedure refer to Figure 2.

 (See Section 4.1, Figure 1 for this step.) W ith the piston NOT installed, install the piston retaining

assembly (5) onto the mounting post (7).

 Using circlip pliers, remove the spring retaining circlip (1) from the top of the assembly.

As the circlip is removed, the spring washer (2) will lift slightly as the springs (3, 5) decompress.

 Lift off spring washer (2).  Gently lift out the spring carrier (4) along with the four high stop springs (3) it carries.

This leaves behind, in the piston retaining nut (7), the c ylinder stroke limiter (6) and the four low stop springs (5). Tak e c are that the spr ings do not drop down into the meas ured pressure opening in the center of the mounting post.

 Using tweezers, carefully remove the four low stop springs (5). T hen lift out the cylinder

stroke limiter (6).

 Caution

The cylinder stroke limiter (6) floats with the cylinder and is thus part of the cylinder assembly mass. Take care not to contaminate this part when handling it. It is prefe rable to avoid contac ting this p art with bare hands.



Spring Retaining Circlip

 Spring Washer  (4) HighSt op S pri ngs  Spring Carrier  (4) LowStop Springs  Cylinder Stroke Limiter  Piston Ret ai ni ng Nut  Upper Piston Seal i ng O-ring (B rown, V i t on, 2-029)  Mounting Post O-ring (B rown, Vi t on, 2-019)

Figure 2. Piston Retainer Assembly

PG7607™ OPERATION AND MAINTENANCE MANUAL

4.4.2 Reassembly Procedure

To reassemble the cylinder stroke limiter into the piston retaining assembly, follow the procedure below. Numerical references in this procedure refer to Figure 2.

 Remove the piston retaining nut (7) from the mounting post and set aside.  Flip over the spring carrier (4) and place the f our low stop springs (5) into the four holes

on the bottom of the spring carrier (4) (the bottom of the spring carrier is the side WITHOUT the white plastic ring).

 Place the cylinder stroke limiter (6) into the center section of the spring carrier (4).

Be sure to orient the cylinder stroke limiter correctly: pointed end facing out in the direction of the springs.

The cylinder stroke limiter floats with the cylinder and is thus part of the cylinder assembly mass. Take care not to contaminate this part when handling it. It is prefe rable to avoid contac ting this p art with bare hands.

 Carefully slip the piston retaining nut (7) over the spring carrier (4), low stop springs (5)

and piston stroke limiter (6) . Take care s o that the springs do not come out of the holes and so the piston retaining nut (7) does not cock on the spring carrier (4).

 Caution

 Verify that no springs have fallen out of place by pressing the spring carrier (4) into the

piston retaining nut (7) and compressing the springs. There should be about 3 to 4 mm of movement. If there is less, one or several of the springs is probably sideways in the space and the process should be repeated from Step ⊄ above.

 Place the four high stop springs (3) into the holes on the spring carrier (4).  Place the spring washer (2) on top of the high stop springs (3).  Install the spring retaining c irclip (1). The spring washer (2) needs to be press ed down

compressing the springs slightly to allow the circlip (1) to engage in its seat in the retaining nut (7).

5. Troubleshooting

5.1 Overview

Identify the symptom or unexpected behavior you are observing from the SYMPTOM list below. A PROBABLE CAUSE is provided and a SOLUTION is proposed including references to manual sections that provide information that may be of assistance. Table 3 concerns troubleshooting issues for the PG7607 only. See the PG7000 Operation and Maintenance Manual for the complete PG7000 troubleshooting table.

Table 3. PG7607 Troubleshooting Checklist

SYMPTOM PROBABLE CAUSE SOLUTION

There is internal leak in the PG 7607 that cannot be located.

Cylinder cap O-ring is incorrectly installed, damaged or missing.

Check cylinder cap O-ring (see Section

2.2.2).

PG7607™ OPERATION AND MAINTENANCE MANUAL

Notes

Fluke Calibration PG7607, PG7607 Operation and Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table Of Contents

Tables

Figures

About This Manual

1. Introduction

1.1 Product Overview

1.2 Specifications

1.2.1 General Specifications

1.2.2 Piston-Cylinder Assembly

1.2.3 Pressure Measurements

2. Installation

2.1 Unpacking and Inspection

2.1.1 Removing From Packagi ng

2.1.1.1 Piston-Cylinder Assembly

2.1.2 Inspecting Contents

2.1.2.1 PG7607 Platform

2.1.2.2 Piston-Cylinder Assembly

2.2 Initial Setup

2.2.1 CCP Pressure Connec t ion

2.2.2 Installing and Removing the Piston-Cylinder Assembly

3. Operation

3.1 Controlled Clearance Pressure (CCP)

3.2 [HEAD]

4. Maintenance, Adjustments and Calibration

4.1 Piston-Cylinder A ssembly and Disassembly

4.2 Cleaning Piston-Cylinders

4.3 Piston-Cylinder Recalibration

4.3.1 Mass of the Cylinder

4.4 Disassembly of Piston Retaining Assembly

4.4.1 Disassembly Procedure

4.4.2 Reassembly Procedure

5. Troubleshooting

5.1 Overview